Abstract

This paper presents a modified Bouc-Wen model for asymmetric rate-dependent hysteresis in piezoelectric actuator. On this basis, we develop a new digital inverse controller with a simple structure cascaded in the feedforward path for piezoelectric actuator. In order to eliminate modeling errors and parameter uncertainties, the developed inverse controller is combined with a feedback loop to establish a hybrid control scheme. In our experiments, the proposed model together with the developed hybrid control scheme has shown significantly reduced tracking errors caused by asymmetric rate-dependent hysteresis in piezoelectric actuator.

Received 06 October 2013Accepted 11 November 2013Published online 27 November 2013

Acknowledgments:

We thank Associate Editor and the anonymous reviewers for their valuable and constructive comments. We acknowledge financial support from National Natural Science Foundation of China (Grant No. 51235005), Foundation for Innovative Research Groups of the National Natural Science Foundation of China (Grant No. 51121002), and National Basic Research Program of China (973 Program) (Grant No. 2009CB724205).